diff --git a/swagger_parser/swagger_parser.py b/swagger_parser/swagger_parser.py
index fa7a349..314b7fe 100755
--- a/swagger_parser/swagger_parser.py
+++ b/swagger_parser/swagger_parser.py
@@ -933,7 +933,7 @@ def _validate_post_body(actual_request_body, body_specification):
         return True, ""
 
     # Are there required parameters? - there is only ONE body, so we check that one
-    parameters_required = body_specification['parameters']['body']['required']
+    parameters_required = body_specification['parameters']['body'].get('required')
 
     # What if it says 'required' but there is no schema ? - we reject it
     schema_present = body_specification['parameters']['body'].get('schema')